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    • 1. 发明专利
    • Method and apparatus for speech coding
    • 语音编码方法与装置
    • JP2013218360A
    • 2013-10-24
    • JP2013161813
    • 2013-08-02
    • Motorola Mobility Incモトローラ モビリティ インコーポレイテッド
    • JASIUK MARK ARAMABADRAN TENKASI VMITTAL UDARASHLEY JAMES PMCLAUGHLIN MICHAEL J
    • G10L19/09G10L19/08
    • G10L19/09
    • PROBLEM TO BE SOLVED: To provide a method and apparatus for speech coding with improved speech quality.SOLUTION: A method for coding speech by a speech coder comprises the steps of: receiving an input signal; generating a target vector based on the input signal; generating a plurality of weighted adaptive codebook vectors based on a signal sub-sample resolution delay value, an adaptive codebook, and a weighted synthesis filter; generating a weighted fixed codebook (FCB) excitation vector based on the target vector and the plurality of weighted adaptive codebook vectors; generating a plurality of correlation terms based on the target vector, the plurality of weighted adaptive codebook vectors, and the weighted FCB excitation vector; and selecting a gain vector from a table in response to an error minimization criterion, where the gain vector consists of at least two adaptive codebook gains and one fixed codebook gain, and where the error minimization criterion is based on the plurality of correlation terms.
    • 要解决的问题:提供一种用于具有改进的语音质量的语音编码的方法和装置。解决方案:一种由语音编码器对语音进行编码的方法,包括以下步骤:接收输入信号; 基于所述输入信号生成目标矢量; 基于信号子采样分辨率延迟值,自适应码本和加权合成滤波器生成多个加权自适应码本向量; 基于所述目标矢量和所述多个加权自适应码本矢量生成加权固定码本(FCB)激励矢量; 基于目标矢量,多个加权自适应码本矢量和加权FCB激励矢量生成多个相关项; 以及响应于误差最小化准则从表中选择增益矢量,其中所述增益矢量由至少两个自适应码本增益和一个固定码本增益组成,并且其中所述误差最小化准则基于所述多个相关项。